README.md

Run with

1. bundle install --binstubs
2. mkdir reports
3. bin/ruby-prof --mode=cpu -x 'Kernel#gem_original_require' -x 'Kernel#require' -x 'Kernel#load' -f reports -p multi --exclude-common-callbacks --exclude-common-cycles -- bin/fluentd --config fluent.conf --no-supervisor
4. Ctrl-C after a few seconds and wait for it to finish
5. Look at reports/

fluent.conf

<source>
  @type dummy
  tag to.es
  dummy {"hello":"world","@timestamp":"Thu Nov 29 14:33:20 GMT 2001"}
  rate 1000
</source>

<match to.es>
  @type elasticsearch
  logstash_format true
  buffer_chunk_limit 64k
  flush_interval 2s
</match>

Gemfile

source 'https://rubygems.org'

gem 'fluentd'
gem 'fluent-plugin-elasticsearch'

gem 'ruby-prof'